Electric fuse.



No. 653,84l.

(No Model.)

Patented July l7, I900. BEAM; ELEQTRiIEEZ Buss.

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Witness es.

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UNITED STATES PATENT Cement THOMAS H. BRADY, OF NEW BRITAIN, CONNECTICUT.

ELECTRIC FUSE.

SPECIFICATION forming part of Letters Patent No. 653,841, dated July 1?, 1900.

Application filed January 2, 1900. Serial No. 6'7. (No model.)

To all whom it may concern:

Be it known that I, THOMAS H. BRADY, a citizen of the United States of America, residing and having post-office address at New Britain, in the county of Hartford and State of Connecticut, have invented a certain new and useful Improvement in Electric Fuses of which the following is a description, ref

erence being had to the accompanying drawings, wherein Figure l is a side view of an inclosed fuse embodying said improvement. Fig. 2 is a View of the same in longitudinal section on the plane denoted by the dotted line as a: of Fig. 1 looking downward;

The object of the improvement is the production of an inclosed fuse for an electric circuit the burning out of which shall denote at one end to one of the cross-heads and at the other end to the spring f, passing intermediately throughthe other cross-head, the hole through which it passes being slightly larger thanthe rod.

The letter 9 denotes a case inclosing the fuse. The spring f extends exteriorly of the case and is there attached by its outer end to the case, so that when the apparatus is properly disposed for use the spring is under tension. Should the fuse be burned out, the fusible metal melts, whereby the spring is re leased and so changes its shape exterior-1y of the case as to there denote that fact.

It is of the essence of my improvement that the spring itself should extend outside of the inclosing case, so that no motion of another part is necessary in order to disclose the burning out of the fuse exteriorly of the inclosing case.

I claim as my improvement- In an electric fuse, the combination of the conductors adapted to form part of an electric circuit, the fusible metal interposed between such conductors, the case inclosing the fusible metal, and the spring connected, under tension, to the fusible metal and extend ing exteriorly of the case, all substantially as described and for the purposes set forth.

THOMAS H. BRADY.

Witnesses:

W. E. SIMoNns, LUITGARD MORLA. 

